CA2488036A1 - Doppler type ultrasonic flowmeter, method of operation and flow rate measuring method - Google Patents
Doppler type ultrasonic flowmeter, method of operation and flow rate measuring method Download PDFInfo
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- CA2488036A1 CA2488036A1 CA002488036A CA2488036A CA2488036A1 CA 2488036 A1 CA2488036 A1 CA 2488036A1 CA 002488036 A CA002488036 A CA 002488036A CA 2488036 A CA2488036 A CA 2488036A CA 2488036 A1 CA2488036 A1 CA 2488036A1
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- flow
- speed
- fluid
- measured
- speed distribution
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Classifications
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01F—MEASURING VOLUME, VOLUME FLOW, MASS FLOW OR LIQUID LEVEL; METERING BY VOLUME
- G01F1/00—Measuring the volume flow or mass flow of fluid or fluent solid material wherein the fluid passes through a meter in a continuous flow
- G01F1/66—Measuring the volume flow or mass flow of fluid or fluent solid material wherein the fluid passes through a meter in a continuous flow by measuring frequency, phase shift or propagation time of electromagnetic or other waves, e.g. using ultrasonic flowmeters
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01F—MEASURING VOLUME, VOLUME FLOW, MASS FLOW OR LIQUID LEVEL; METERING BY VOLUME
- G01F1/00—Measuring the volume flow or mass flow of fluid or fluent solid material wherein the fluid passes through a meter in a continuous flow
- G01F1/66—Measuring the volume flow or mass flow of fluid or fluent solid material wherein the fluid passes through a meter in a continuous flow by measuring frequency, phase shift or propagation time of electromagnetic or other waves, e.g. using ultrasonic flowmeters
- G01F1/663—Measuring the volume flow or mass flow of fluid or fluent solid material wherein the fluid passes through a meter in a continuous flow by measuring frequency, phase shift or propagation time of electromagnetic or other waves, e.g. using ultrasonic flowmeters by measuring Doppler frequency shift
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01P—MEASURING LINEAR OR ANGULAR SPEED, ACCELERATION, DECELERATION, OR SHOCK; INDICATING PRESENCE, ABSENCE, OR DIRECTION, OF MOVEMENT
- G01P5/00—Measuring speed of fluids, e.g. of air stream; Measuring speed of bodies relative to fluids, e.g. of ship, of aircraft
- G01P5/24—Measuring speed of fluids, e.g. of air stream; Measuring speed of bodies relative to fluids, e.g. of ship, of aircraft by measuring the direct influence of the streaming fluid on the properties of a detecting acoustical wave
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01P—MEASURING LINEAR OR ANGULAR SPEED, ACCELERATION, DECELERATION, OR SHOCK; INDICATING PRESENCE, ABSENCE, OR DIRECTION, OF MOVEMENT
- G01P5/00—Measuring speed of fluids, e.g. of air stream; Measuring speed of bodies relative to fluids, e.g. of ship, of aircraft
- G01P5/24—Measuring speed of fluids, e.g. of air stream; Measuring speed of bodies relative to fluids, e.g. of ship, of aircraft by measuring the direct influence of the streaming fluid on the properties of a detecting acoustical wave
- G01P5/241—Measuring speed of fluids, e.g. of air stream; Measuring speed of bodies relative to fluids, e.g. of ship, of aircraft by measuring the direct influence of the streaming fluid on the properties of a detecting acoustical wave by using reflection of acoustical waves, i.e. Doppler-effect
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01S—RADIO DIRECTION-FINDING; RADIO NAVIGATION; DETERMINING DISTANCE OR VELOCITY BY USE OF RADIO WAVES; LOCATING OR PRESENCE-DETECTING BY USE OF THE REFLECTION OR RERADIATION OF RADIO WAVES; ANALOGOUS ARRANGEMENTS USING OTHER WAVES
- G01S15/00—Systems using the reflection or reradiation of acoustic waves, e.g. sonar systems
- G01S15/02—Systems using the reflection or reradiation of acoustic waves, e.g. sonar systems using reflection of acoustic waves
- G01S15/50—Systems of measurement, based on relative movement of the target
- G01S15/58—Velocity or trajectory determination systems; Sense-of-movement determination systems
- G01S15/582—Velocity or trajectory determination systems; Sense-of-movement determination systems using transmission of interrupted pulse-modulated waves and based upon the Doppler effect resulting from movement of targets
Abstract
A doppler ultrasonic flowmeter 10A includes: a Udflow unit 13 for calculating the speed of a great number of reflectors 25 contained in a fluid 12 to be measured; a flow-speed distribution calculating element 70 for calculating the flow-speed distribution of the fluid 12 to be measured within a fluid tube 11 by performing computation processing for the flow-speed data of the reflectors 25 received from the Udflow unit 13; a center position detecting element 71 for detecting the center position of the fluid tube 11; a flow-speed distribution calculating member 67 having an area selecting element 72 which allows the user to select a division area within the fluid tube 11 in units of the division area; the flow-speed distribution being calculated for the selected division area using the reflectors 25; and a flow calculating member 68 for measuring the flow by further performing computation processing for the flow-speed distribution of the fluid 12 to be measured. Furthermore, the doppler ultrasonic flowmeter 10A includes a display monitor 39 for displaying the calculation results output from at least one of the flow-speed distribution calculating member 67 and the flow calculating member 68. The present invention having such a configuration provides a doppler ultrasonic flowmeter, a flow measurement method, and a flow measurement program, having the advantage of enabling measurement of the flow-speed distribution and measurement of the flow, regardless of irregularities in the measurement results of the flow-speed distribution.
Claims (29)
1. A doppler ultrasonic flowmeter comprising:
an ultrasonic transmission member for casting ultrasonic pulses with a predetermined frequency onto the fluid within a tube, which is to be measured, along a measurement line from an ultrasonic transducer;
a flow-speed distribution measurement unit for receiving ultrasonic echoes reflected from the measurement region due to ultrasonic pulses cast onto the fluid to be measured so as to measure the flow-speed distribution of the fluid to be measured in the measurement region;
a flow measurement unit for measuring the flow of the fluid to be measured in the measurement region based upon the flow-speed distribution of the fluid to be measured; and a frequency selecting/setting member for automatically selecting the optimum frequency, i.e., the basic frequency of which causes the resonant transmission phenomenon with regard to the tube wall of a fluid tube within which the fluid to be measured flows, wherein said ultrasonic transmission member has a configuration for emitting ultrasonic pulses with the optimum frequency selected by the frequency selecting/setting member.
an ultrasonic transmission member for casting ultrasonic pulses with a predetermined frequency onto the fluid within a tube, which is to be measured, along a measurement line from an ultrasonic transducer;
a flow-speed distribution measurement unit for receiving ultrasonic echoes reflected from the measurement region due to ultrasonic pulses cast onto the fluid to be measured so as to measure the flow-speed distribution of the fluid to be measured in the measurement region;
a flow measurement unit for measuring the flow of the fluid to be measured in the measurement region based upon the flow-speed distribution of the fluid to be measured; and a frequency selecting/setting member for automatically selecting the optimum frequency, i.e., the basic frequency of which causes the resonant transmission phenomenon with regard to the tube wall of a fluid tube within which the fluid to be measured flows, wherein said ultrasonic transmission member has a configuration for emitting ultrasonic pulses with the optimum frequency selected by the frequency selecting/setting member.
2. A doppler ultrasonic flowmeter comprising:
an ultrasonic transmission member for casting ultrasonic pulses with a predetermined frequency onto the fluid within a fluid tube, which is to be measured, along a measurement line from an ultrasonic transducer;
a flow-speed distribution measurement unit for receiving ultrasonic echoes reflected from the measurement region due to ultrasonic pulses cast onto the fluid to be measured so as to measure the flow-speed distribution of the fluid to be measured in the measurement region;
a flow measurement unit for measuring the flow of the fluid to be measured in the measurement region based upon the flow-speed distribution of the fluid to be measured; and an incident angle adjusting/setting member for adjusting and setting the incident angle of the ultrasonic pulses cast from the ultrasonic transducer into the fluid to be measured, wherein said incident angle adjusting/setting member has a configuration for adjusting and setting the position and the direction of the ultrasonic transducer such that the ultrasonic pulses are cast onto the fluid tube with an incident angle which causes the resonant transmission phenomenon with regard to the tube wall of the fluid tube.
an ultrasonic transmission member for casting ultrasonic pulses with a predetermined frequency onto the fluid within a fluid tube, which is to be measured, along a measurement line from an ultrasonic transducer;
a flow-speed distribution measurement unit for receiving ultrasonic echoes reflected from the measurement region due to ultrasonic pulses cast onto the fluid to be measured so as to measure the flow-speed distribution of the fluid to be measured in the measurement region;
a flow measurement unit for measuring the flow of the fluid to be measured in the measurement region based upon the flow-speed distribution of the fluid to be measured; and an incident angle adjusting/setting member for adjusting and setting the incident angle of the ultrasonic pulses cast from the ultrasonic transducer into the fluid to be measured, wherein said incident angle adjusting/setting member has a configuration for adjusting and setting the position and the direction of the ultrasonic transducer such that the ultrasonic pulses are cast onto the fluid tube with an incident angle which causes the resonant transmission phenomenon with regard to the tube wall of the fluid tube.
3. A doppler ultrasonic flowmeter comprising:
an ultrasonic transmission member for casting ultrasonic pulses with a predetermined frequency onto the fluid within a fluid tube, which is to be measured, along a measurement line from an ultrasonic transducer;
a flow-speed distribution measurement unit for receiving ultrasonic echoes reflected from the measurement region due to ultrasonic pulses cast onto the fluid to be measured so as to measure the flow-speed distribution of the fluid to be measured in the measurement region;
a flow measurement unit for measuring the flow of the fluid to be measured in the measurement region based upon the flow-speed distribution of the fluid to be measured; and a transducer position adjusting mechanism for adjusting the relative position of a pair of ultrasonic transducers serving as the ultrasonic transmission member, i.e., a first transducer and a second transducer, which are disposed away one from another along the axial direction of a fluid tube, wherein said transducer position adjusting mechanism has a configuration for adjusting the position of the pair of transducers while maintaining the positional relation thereof such that the ultrasonic pulse beam cast from the first transducer and the ultrasonic pulse beam cast from the second transducer are orthogonal one to another in the measurement region within the fluid tube.
an ultrasonic transmission member for casting ultrasonic pulses with a predetermined frequency onto the fluid within a fluid tube, which is to be measured, along a measurement line from an ultrasonic transducer;
a flow-speed distribution measurement unit for receiving ultrasonic echoes reflected from the measurement region due to ultrasonic pulses cast onto the fluid to be measured so as to measure the flow-speed distribution of the fluid to be measured in the measurement region;
a flow measurement unit for measuring the flow of the fluid to be measured in the measurement region based upon the flow-speed distribution of the fluid to be measured; and a transducer position adjusting mechanism for adjusting the relative position of a pair of ultrasonic transducers serving as the ultrasonic transmission member, i.e., a first transducer and a second transducer, which are disposed away one from another along the axial direction of a fluid tube, wherein said transducer position adjusting mechanism has a configuration for adjusting the position of the pair of transducers while maintaining the positional relation thereof such that the ultrasonic pulse beam cast from the first transducer and the ultrasonic pulse beam cast from the second transducer are orthogonal one to another in the measurement region within the fluid tube.
4. A doppler ultrasonic flowmeter according to Claim 3, further comprising:
a first reflected-wave receiver and a second reflected-wave receiver for receiving ultrasonic echoes, i.e., the reflected waves from the measurement region of the fluid tube due to ultrasonic pulses cast from the first transducer and the second transducer;
a velocity-vector calculating member for calculating the velocity vectors in the direction of the ultrasonic measurement lines of the first reflected-wave receiver and the second reflected-wave receiver based upon the magnitude of ultrasonic echoes received by the first reflected-wave receiver and the second reflected-wave receiver, respectively; and a flow-speed vector calculating member for calculating the flow-speed vector of the fluid to be measured, by calculating the vector sum of the velocity vectors calculated by the velocity vector calculating member, wherein said flow-speed distribution measurement unit calculates flow-speed distribution based upon the flow-speed vectors, and wherein said flow measurement unit computes the flow of the fluid to be measured, based upon the flow-speed distribution.
a first reflected-wave receiver and a second reflected-wave receiver for receiving ultrasonic echoes, i.e., the reflected waves from the measurement region of the fluid tube due to ultrasonic pulses cast from the first transducer and the second transducer;
a velocity-vector calculating member for calculating the velocity vectors in the direction of the ultrasonic measurement lines of the first reflected-wave receiver and the second reflected-wave receiver based upon the magnitude of ultrasonic echoes received by the first reflected-wave receiver and the second reflected-wave receiver, respectively; and a flow-speed vector calculating member for calculating the flow-speed vector of the fluid to be measured, by calculating the vector sum of the velocity vectors calculated by the velocity vector calculating member, wherein said flow-speed distribution measurement unit calculates flow-speed distribution based upon the flow-speed vectors, and wherein said flow measurement unit computes the flow of the fluid to be measured, based upon the flow-speed distribution.
5. A doppler ultrasonic flowmeter according to Claim 1, further comprising a flow-speed distribution calculating member for calculating the flow-speed distribution of the fluid to be measured, within the measurement region, wherein said flow-speed distribution calculating member comprise:
a flow-speed distribution calculating element for calculating the flow-speed distribution of the fluid to be measured, within the fluid tube;
a center position detecting element for detecting the center position of the fluid tube; and an area selecting element for selecting an area within the fluid tube where the flow-speed distribution is calculated, in units of division area; the area of the fluid tube being divided at the center position into two division areas, and wherein said flow-speed distribution measurement unit computes the flow-speed distribution for one of the division areas, which has been selected by the area selecting element, and estimate the flow-speed distribution of the fluid to be measured, in the measurement region, on the assumption that the flow-speed distribution is symmetrical with regard to the center position.
a flow-speed distribution calculating element for calculating the flow-speed distribution of the fluid to be measured, within the fluid tube;
a center position detecting element for detecting the center position of the fluid tube; and an area selecting element for selecting an area within the fluid tube where the flow-speed distribution is calculated, in units of division area; the area of the fluid tube being divided at the center position into two division areas, and wherein said flow-speed distribution measurement unit computes the flow-speed distribution for one of the division areas, which has been selected by the area selecting element, and estimate the flow-speed distribution of the fluid to be measured, in the measurement region, on the assumption that the flow-speed distribution is symmetrical with regard to the center position.
6. A doppler ultrasonic flowmeter according to Claim 1, further comprising a flow-speed distribution calculating member for calculating the flow-speed distribution of the fluid to be measured, within the measurement region, wherein said flow-speed distribution calculating member comprises:
a flow-speed distribution calculating element for calculating the flow-speed distribution of the fluid to be measured, within the measurement;
a center position detecting element for detecting the center position of the fluid tubes and an automatic area selecting element for automatically selecting an area within the fluid tube where the flow-speed distribution is calculated, in units of division area; the area of the fluid tube being divided at the center position into two division areas, and wherein said flow-speed distribution measurement unit computes the flow-speed distribution for one of the division areas, which has been selected by the automatic area selecting element, and estimate the flow-speed distribution of the fluid to be measured, in the measurement region, on the assumption that the flow-speed distribution is symmetrical with regard to the center position.
a flow-speed distribution calculating element for calculating the flow-speed distribution of the fluid to be measured, within the measurement;
a center position detecting element for detecting the center position of the fluid tubes and an automatic area selecting element for automatically selecting an area within the fluid tube where the flow-speed distribution is calculated, in units of division area; the area of the fluid tube being divided at the center position into two division areas, and wherein said flow-speed distribution measurement unit computes the flow-speed distribution for one of the division areas, which has been selected by the automatic area selecting element, and estimate the flow-speed distribution of the fluid to be measured, in the measurement region, on the assumption that the flow-speed distribution is symmetrical with regard to the center position.
7. A doppler ultrasonic flowmeter according to Claim 1, further comprising:
an ultrasonic transmission member for casting ultrasonic pulses with an emission frequency of f0 from the ultrasonic transducer into the fluid to be measured, within the fluid tube, along the measurement line with an incident angle a;
a flow-speed distribution measurement unit for receiving ultrasonic echoes reflected from the measurement region due to ultrasonic pulses cast onto the fluid to be measured, with a pulse repetition frequency fPRF, so as to measure the flow-speed distribution of the fluid to be measured within the measurement region;
a flow measurement unit for computing the flow of the fluid to be measured, within the measurement region, based upon the flow-speed distribution of the fluid to be measured; and an optimum-value calculating member for automatically calculating the optimum value used for adjustment of measurement, which depends upon the properties of the object to be measured.
an ultrasonic transmission member for casting ultrasonic pulses with an emission frequency of f0 from the ultrasonic transducer into the fluid to be measured, within the fluid tube, along the measurement line with an incident angle a;
a flow-speed distribution measurement unit for receiving ultrasonic echoes reflected from the measurement region due to ultrasonic pulses cast onto the fluid to be measured, with a pulse repetition frequency fPRF, so as to measure the flow-speed distribution of the fluid to be measured within the measurement region;
a flow measurement unit for computing the flow of the fluid to be measured, within the measurement region, based upon the flow-speed distribution of the fluid to be measured; and an optimum-value calculating member for automatically calculating the optimum value used for adjustment of measurement, which depends upon the properties of the object to be measured.
8. A doppler ultrasonic flowmeter according to Claim 1, further comprising:
an ultrasonic transmission member for casting ultrasonic pulses with an emission frequency of f0 from the ultrasonic transducer into the fluid to be measured, within the fluid tube, along the measurement line with an incident angle .alpha.;
a flow-speed distribution measurement unit for receiving ultrasonic echoes reflected from the measurement region due to ultrasonic pulses cast onto the fluid to be measured, with a pulse repetition frequency f PRF, so as to measure the flow-speed distribution of the fluid to be measured within the measurement region;
a flow measurement unit for computing the flow of the fluid to be measured, within the measurement region, based upon the flow-speed distribution of the fluid to be measured; and an optimum-value calculating member for automatically calculating the optimum value used for adjustment of measurement, which depends upon the properties of the object to be measured, wherein said optimum-value calculating member comprises:~
a data input element for inputting the tube diameter Di of the fluid tube, the ultrasonic wave speed Cw in the fluid to be measured, and the incident angle a of the ultrasonic pulses;
a maximum flow-speed calculating element for calculating the maximum flow speed V based upon the flow-speed distribution calculated by the flow-speed distribution calculating member;
a normalized-speed calculating element for calculating the normalized speed V0 by dividing the calculated maximum flow speed V by the ultrasonic wave speed Cw in the fluid to be measured;
a normalized-frequency calculating element for calculating the normalized frequency Fo by dividing the pulse repetition frequency fPRF by the emission frequency f0;
and a frequency setting element for resetting the emission frequency to an emission frequency f1 so as to satisfy the following expressions: Fr0, >= 4V0 sin a; and fPRF
>=Cw/2Di, wherein said flow-speed distribution measurement unit receives ultrasonic echoes with the updated emission frequency f1 so as to measure the flow-speed distribution.
an ultrasonic transmission member for casting ultrasonic pulses with an emission frequency of f0 from the ultrasonic transducer into the fluid to be measured, within the fluid tube, along the measurement line with an incident angle .alpha.;
a flow-speed distribution measurement unit for receiving ultrasonic echoes reflected from the measurement region due to ultrasonic pulses cast onto the fluid to be measured, with a pulse repetition frequency f PRF, so as to measure the flow-speed distribution of the fluid to be measured within the measurement region;
a flow measurement unit for computing the flow of the fluid to be measured, within the measurement region, based upon the flow-speed distribution of the fluid to be measured; and an optimum-value calculating member for automatically calculating the optimum value used for adjustment of measurement, which depends upon the properties of the object to be measured, wherein said optimum-value calculating member comprises:~
a data input element for inputting the tube diameter Di of the fluid tube, the ultrasonic wave speed Cw in the fluid to be measured, and the incident angle a of the ultrasonic pulses;
a maximum flow-speed calculating element for calculating the maximum flow speed V based upon the flow-speed distribution calculated by the flow-speed distribution calculating member;
a normalized-speed calculating element for calculating the normalized speed V0 by dividing the calculated maximum flow speed V by the ultrasonic wave speed Cw in the fluid to be measured;
a normalized-frequency calculating element for calculating the normalized frequency Fo by dividing the pulse repetition frequency fPRF by the emission frequency f0;
and a frequency setting element for resetting the emission frequency to an emission frequency f1 so as to satisfy the following expressions: Fr0, >= 4V0 sin a; and fPRF
>=Cw/2Di, wherein said flow-speed distribution measurement unit receives ultrasonic echoes with the updated emission frequency f1 so as to measure the flow-speed distribution.
9. A doppler ultrasonic flowmeter according to Claim 2, further comprising:
an ultrasonic transmission member for casting ultrasonic pulses with an emission frequency of f0 from the ultrasonic transducer into the fluid to be measured, within the fluid tube, along the measurement line with an incident angle a;
a flow-speed distribution measurement unit for receiving ultrasonic echoes reflected from the measurement region due to ultrasonic pulses cast onto the fluid to be measured, with a pulse repetition frequency fPRF. so as to measure the flow-speed distribution of the fluid to be measured within the measurement region;
a flow measurement unit for computing the flow of the fluid to be measured, within the measurement region, based upon the flow-speed distribution of the fluid to be measured; and an optimum-value calculating member for automatically calculating the optimum value used for adjustment of measurement, which depends upon the properties of the object to be measured, wherein said optimum-value calculating member comprises:
a data input element for inputting the tube diameter Di of the fluid tube, the ultrasonic wave speed Cw in the fluid to be measured, and the incident angle a of the ultrasonic pulses;
a maximum flow-speed calculating element for calculating the maximum flow speed V based upon the flow-speed distribution calculated by the flow-speed distribution calculating member;
a normalized-speed calculating element for calculating the normalized speed V0 by dividing the calculated maximum flow speed V by the ultrasonic wave speed Cw in the fluid to be measured;
a normalized-frequency calculating element for calculating the normalized frequency F0 by dividing the pulse repetition frequency fPRF by the emission frequency f0;
and an incident angle setting element for reset the incident angle of the ultrasonic pulses to an incident angle al so as to satisfy the following expressions: F0 >= 4V0 .cndot. sin a; and fPRF <= Cw/2Di, wherein said flow-speed distribution measurement unit receives ultrasonic echoes due to ultrasonic pulses cast with the updated incident angle a1 so as to measure the flow-speed distribution.
an ultrasonic transmission member for casting ultrasonic pulses with an emission frequency of f0 from the ultrasonic transducer into the fluid to be measured, within the fluid tube, along the measurement line with an incident angle a;
a flow-speed distribution measurement unit for receiving ultrasonic echoes reflected from the measurement region due to ultrasonic pulses cast onto the fluid to be measured, with a pulse repetition frequency fPRF. so as to measure the flow-speed distribution of the fluid to be measured within the measurement region;
a flow measurement unit for computing the flow of the fluid to be measured, within the measurement region, based upon the flow-speed distribution of the fluid to be measured; and an optimum-value calculating member for automatically calculating the optimum value used for adjustment of measurement, which depends upon the properties of the object to be measured, wherein said optimum-value calculating member comprises:
a data input element for inputting the tube diameter Di of the fluid tube, the ultrasonic wave speed Cw in the fluid to be measured, and the incident angle a of the ultrasonic pulses;
a maximum flow-speed calculating element for calculating the maximum flow speed V based upon the flow-speed distribution calculated by the flow-speed distribution calculating member;
a normalized-speed calculating element for calculating the normalized speed V0 by dividing the calculated maximum flow speed V by the ultrasonic wave speed Cw in the fluid to be measured;
a normalized-frequency calculating element for calculating the normalized frequency F0 by dividing the pulse repetition frequency fPRF by the emission frequency f0;
and an incident angle setting element for reset the incident angle of the ultrasonic pulses to an incident angle al so as to satisfy the following expressions: F0 >= 4V0 .cndot. sin a; and fPRF <= Cw/2Di, wherein said flow-speed distribution measurement unit receives ultrasonic echoes due to ultrasonic pulses cast with the updated incident angle a1 so as to measure the flow-speed distribution.
10. A doppler ultrasonic flowmeter according to Claim 1 comprising:
an ultrasonic transmission member for casting ultrasonic pulses with a predetermined frequency onto the fluid within a fluid tube, which is to be measured, along a measurement line from an ultrasonic transducer;
a flow-speed distribution measurement unit for receiving ultrasonic echoes reflected from the measurement region due to ultrasonic pulses cast onto the fluid to be measured so as to measure the flow-speed distribution of the fluid to be measured in the measurement region;
a flow measurement unit for measuring the flow of the fluid to be measured in the measurement region based upon the flow-speed distribution of the fluid to be measured;
a channel distance computing member for computing the minimum channel distance based upon the frequency of the ultrasonic pulses and the speed thereof;
a measurement range display member for displaying the measurement range calculated based upon the minimum channel distance; and a channel distance change/setting member for changing the channel distance to a value obtained by multiplying the minimum channel distance by an integer according to instructions from the user, wherein said flow-speed distribution measurement unit makes measurement of the flow-speed distribution with the channel distance thus determined.
an ultrasonic transmission member for casting ultrasonic pulses with a predetermined frequency onto the fluid within a fluid tube, which is to be measured, along a measurement line from an ultrasonic transducer;
a flow-speed distribution measurement unit for receiving ultrasonic echoes reflected from the measurement region due to ultrasonic pulses cast onto the fluid to be measured so as to measure the flow-speed distribution of the fluid to be measured in the measurement region;
a flow measurement unit for measuring the flow of the fluid to be measured in the measurement region based upon the flow-speed distribution of the fluid to be measured;
a channel distance computing member for computing the minimum channel distance based upon the frequency of the ultrasonic pulses and the speed thereof;
a measurement range display member for displaying the measurement range calculated based upon the minimum channel distance; and a channel distance change/setting member for changing the channel distance to a value obtained by multiplying the minimum channel distance by an integer according to instructions from the user, wherein said flow-speed distribution measurement unit makes measurement of the flow-speed distribution with the channel distance thus determined.
11. A doppler ultrasonic flowmeter according to Claim 1 comprising:
an ultrasonic transmission member for casting ultrasonic pulses with a predetermined frequency onto the fluid within a fluid tube, which is to be measured, along a measurement line from an ultrasonic transducer;
a flow-speed distribution measurement unit for receiving ultrasonic echoes reflected from the measurement region due to ultrasonic pulses cast onto the fluid to be measured so as to measure the flow-speed distribution of the fluid to be measured in the measurement region;
a flow measurement unit for computing the flow of the fluid to be measured in the measurement region based upon the flow-speed distribution of the fluid to be measured;
a channel distance computing member for computing the minimum channel distance based upon the frequency of the ultrasonic pulses and the speed thereof; and an automatic channel distance change/determination member for determining whether or not the channel distance is changed to a value obtained by multiplying the minimum channel distance by an integer, according to the required measurement range determined based upon the input data of the inner diameter of the fluid tube within which the fluid to be measured flows, and so forth, wherein said flow-speed distribution measurement unit makes measurement of the flow-speed distribution with the channel distance thus determined.
an ultrasonic transmission member for casting ultrasonic pulses with a predetermined frequency onto the fluid within a fluid tube, which is to be measured, along a measurement line from an ultrasonic transducer;
a flow-speed distribution measurement unit for receiving ultrasonic echoes reflected from the measurement region due to ultrasonic pulses cast onto the fluid to be measured so as to measure the flow-speed distribution of the fluid to be measured in the measurement region;
a flow measurement unit for computing the flow of the fluid to be measured in the measurement region based upon the flow-speed distribution of the fluid to be measured;
a channel distance computing member for computing the minimum channel distance based upon the frequency of the ultrasonic pulses and the speed thereof; and an automatic channel distance change/determination member for determining whether or not the channel distance is changed to a value obtained by multiplying the minimum channel distance by an integer, according to the required measurement range determined based upon the input data of the inner diameter of the fluid tube within which the fluid to be measured flows, and so forth, wherein said flow-speed distribution measurement unit makes measurement of the flow-speed distribution with the channel distance thus determined.
12. A doppler ultrasonic flowmeter according to Claim 1 comprising:
an ultrasonic transmission member for casting ultrasonic pulses with a predetermined frequency onto the fluid within a tube, which is to be measured, along a measurement line from an ultrasonic transducer;
a flow-speed distribution measurement unit for receiving ultrasonic echoes reflected from the measurement region due to ultrasonic pulses cast onto the fluid to be measured so as to measure the flow-speed distribution of the fluid to be measured in the measurement region;
a flow measurement unit for computing the flow of the fluid to be measured in the measurement region based upon the flow-speed distribution of the fluid to be measured;
a flow-speed distribution output member for outputting the relation between the flow-speed distribution of the fluid to be measured in the measurement region and the distance in the direction of the measurement line in the form of an image on a screen;
a flow-speed zero-point display member for superimposing the zero points each of which represent the flow speed of zero, on the flow-speed distribution output by the flow-speed distribution output member, in the form of a continuous line; and a flow-speed measurement range switching member which allows the user to switch the measurement range between the normal measurement range and the double-measurement-range, thereby enabling measurement of the positive flow speed in a measurement range twice that of the normal measurement range, according to the selection of the user, wherein in the event that the user has requested the flow-speed measurement range switching member to switch the flow-speed measurement range, the flow-speed distribution output member outputs the flow-speed distribution in the positive range alone, as well as measuring the flow-speed distribution with a measurement range twice that of the normal measurement mode.
an ultrasonic transmission member for casting ultrasonic pulses with a predetermined frequency onto the fluid within a tube, which is to be measured, along a measurement line from an ultrasonic transducer;
a flow-speed distribution measurement unit for receiving ultrasonic echoes reflected from the measurement region due to ultrasonic pulses cast onto the fluid to be measured so as to measure the flow-speed distribution of the fluid to be measured in the measurement region;
a flow measurement unit for computing the flow of the fluid to be measured in the measurement region based upon the flow-speed distribution of the fluid to be measured;
a flow-speed distribution output member for outputting the relation between the flow-speed distribution of the fluid to be measured in the measurement region and the distance in the direction of the measurement line in the form of an image on a screen;
a flow-speed zero-point display member for superimposing the zero points each of which represent the flow speed of zero, on the flow-speed distribution output by the flow-speed distribution output member, in the form of a continuous line; and a flow-speed measurement range switching member which allows the user to switch the measurement range between the normal measurement range and the double-measurement-range, thereby enabling measurement of the positive flow speed in a measurement range twice that of the normal measurement range, according to the selection of the user, wherein in the event that the user has requested the flow-speed measurement range switching member to switch the flow-speed measurement range, the flow-speed distribution output member outputs the flow-speed distribution in the positive range alone, as well as measuring the flow-speed distribution with a measurement range twice that of the normal measurement mode.
13. A doppler ultrasonic flowmeter according to Claim 1 comprising:
an ultrasonic transmission member for casting ultrasonic pulses with a predetermined frequency onto the fluid within a fluid tube, which is to be measured, along a measurement line from an ultrasonic transducer;
a flow-speed distribution measurement unit for receiving ultrasonic echoes reflected from the measurement region due to ultrasonic pulses cast onto the fluid to be measured so as to measure the flow-speed distribution of the fluid to be measured in the measurement region;
a flow measurement unit for computing the flow of the fluid to be measured in the measurement region based upon the flow-speed distribution of the fluid to be measured;
a positive/negative determination member for determining whether or not the fluid-speed distribution of the fluid to be measured contains any negative flow-speed components in the measurement region; and a flow-speed measurement range switching member for switching the measurement range of the flow-speed distribution measurement unit to a measurement range twice that of the normal measurement mode, for measuring the positive flow speed, in the event that determination has been made that the flow-speed distribution contains no negative flow-speed components, wherein in the event that determination has been made that the flow-speed distribution contains no negative flow-speed components, the flow-speed distribution measurement unit makes measurement of the flow-speed distribution with a measurement range twice that of the normal measurement mode.
an ultrasonic transmission member for casting ultrasonic pulses with a predetermined frequency onto the fluid within a fluid tube, which is to be measured, along a measurement line from an ultrasonic transducer;
a flow-speed distribution measurement unit for receiving ultrasonic echoes reflected from the measurement region due to ultrasonic pulses cast onto the fluid to be measured so as to measure the flow-speed distribution of the fluid to be measured in the measurement region;
a flow measurement unit for computing the flow of the fluid to be measured in the measurement region based upon the flow-speed distribution of the fluid to be measured;
a positive/negative determination member for determining whether or not the fluid-speed distribution of the fluid to be measured contains any negative flow-speed components in the measurement region; and a flow-speed measurement range switching member for switching the measurement range of the flow-speed distribution measurement unit to a measurement range twice that of the normal measurement mode, for measuring the positive flow speed, in the event that determination has been made that the flow-speed distribution contains no negative flow-speed components, wherein in the event that determination has been made that the flow-speed distribution contains no negative flow-speed components, the flow-speed distribution measurement unit makes measurement of the flow-speed distribution with a measurement range twice that of the normal measurement mode.
14. An ultrasonic flow measurement method comprising:
a reflector-group-speed calculating step for receiving ultrasonic echoes due to ultrasonic pulses cast onto the fluid to be measured, so as to calculate the speed of each of a number of reflector groups contained in the fluid to be measured;
a flow-speed distribution measurement processing step for measuring the flow-speed distribution of the fluid to be measured, based upon the flow-speed distribution data of the reflector groups obtained in the reflector-group-speed calculating step; and a flow measurement processing step for measuring the flow by further performing computation processing for the flow-speed distribution data of the fluid to be measured, wherein said flow-speed distribution measurement processing step comprises:
a flow-speed distribution calculating step for calculating the flow-speed distribution data of the fluid to be measured, and the center position data of the fluid tube, by performing computation processing for the flow-speed distribution of the reflectors;
a flow-speed distribution data output step for outputting the flow-speed distribution data and center position data thus obtained in the flow-speed distribution calculating step so as to be displayed on display; and an area determination step which allows the user to set a division area where the speed of the reflector groups is calculated in the flow-speed distribution calculating step;
the area of the fluid tube being divided at the center position into two division areas.
a reflector-group-speed calculating step for receiving ultrasonic echoes due to ultrasonic pulses cast onto the fluid to be measured, so as to calculate the speed of each of a number of reflector groups contained in the fluid to be measured;
a flow-speed distribution measurement processing step for measuring the flow-speed distribution of the fluid to be measured, based upon the flow-speed distribution data of the reflector groups obtained in the reflector-group-speed calculating step; and a flow measurement processing step for measuring the flow by further performing computation processing for the flow-speed distribution data of the fluid to be measured, wherein said flow-speed distribution measurement processing step comprises:
a flow-speed distribution calculating step for calculating the flow-speed distribution data of the fluid to be measured, and the center position data of the fluid tube, by performing computation processing for the flow-speed distribution of the reflectors;
a flow-speed distribution data output step for outputting the flow-speed distribution data and center position data thus obtained in the flow-speed distribution calculating step so as to be displayed on display; and an area determination step which allows the user to set a division area where the speed of the reflector groups is calculated in the flow-speed distribution calculating step;
the area of the fluid tube being divided at the center position into two division areas.
15. An ultrasonic flow measurement method comprising:
a reflector-group-speed calculating step for receiving ultrasonic echoes due to ultrasonic pulses cast onto the fluid to be measured, so as to calculate the speed of each of a number of reflector groups contained in the fluid to be measured;
a flow-speed distribution measurement processing step for measuring the flow-speed distribution of the fluid to be measured, based upon the flow-speed distribution data of the reflector groups obtained in the reflector-group-speed calculating step; and a flow measurement processing step for measuring the flow by further performing computation processing for the flow-speed distribution data of the fluid to be measured, wherein said flow-speed distribution measurement processing step comprises:
a flow-speed distribution calculating step for calculating the flow-speed distribution data of the fluid to be measured, and the center position data of the fluid tube, by performing computation processing for the flow-speed distribution of the reflectors;
an automatic area selecting step for automatically selecting a division area where the flow-speed distribution is calculated using the reflector groups; the area of the fluid tube being divided at the center position into two division areas; and a flow-speed distribution data output step for outputting the flow-speed distribution data and the center position data obtained in the flow-speed distribution calculating step and the automatic area selecting step, so as to be displayed on display.
a reflector-group-speed calculating step for receiving ultrasonic echoes due to ultrasonic pulses cast onto the fluid to be measured, so as to calculate the speed of each of a number of reflector groups contained in the fluid to be measured;
a flow-speed distribution measurement processing step for measuring the flow-speed distribution of the fluid to be measured, based upon the flow-speed distribution data of the reflector groups obtained in the reflector-group-speed calculating step; and a flow measurement processing step for measuring the flow by further performing computation processing for the flow-speed distribution data of the fluid to be measured, wherein said flow-speed distribution measurement processing step comprises:
a flow-speed distribution calculating step for calculating the flow-speed distribution data of the fluid to be measured, and the center position data of the fluid tube, by performing computation processing for the flow-speed distribution of the reflectors;
an automatic area selecting step for automatically selecting a division area where the flow-speed distribution is calculated using the reflector groups; the area of the fluid tube being divided at the center position into two division areas; and a flow-speed distribution data output step for outputting the flow-speed distribution data and the center position data obtained in the flow-speed distribution calculating step and the automatic area selecting step, so as to be displayed on display.
16. An ultrasonic flow measurement method comprising:
a reflector-group-speed calculating step for receiving ultrasonic echoes due to ultrasonic pulses cast onto the fluid to be measured, so as to calculate the speed of each of a number of reflector groups contained in the fluid to be measured;
a flow-speed distribution measurement processing step for measuring the flow-speed distribution of the fluid to be measured, based upon the flow-speed distribution data of the reflector groups obtained in the reflector-group-speed calculating step;
an optimum-value setting step for calculating the optimum values of the basic frequency f0, the pulse repetition frequency f PRF, and the incident angle .alpha.; and a flow measurement processing step for measuring the flow by further performing computation processing for the flow-speed distribution data of the fluid to be measured, wherein said reflector-group-speed calculating step comprises:
an initial value acquisition step for receiving the initial values of the basic frequency f0, the pulse repetition frequency f PRF, the incident angle .alpha., at the start of measurement; and a reflector-group-speed calculating step for receiving ultrasonic echoes due to ultrasonic pulses cast onto the fluid to be measured, so as to calculate the speed of each of the number of reflectors contained in the fluid to be measured, and wherein said optimum-value setting step includes an emission frequency reset step for resetting the emission frequency to an emission frequency f1 so as to satisfy the following expressions: F0 >= 4V0 sin .alpha.; and f PRF <=
Cw/2Di.
a reflector-group-speed calculating step for receiving ultrasonic echoes due to ultrasonic pulses cast onto the fluid to be measured, so as to calculate the speed of each of a number of reflector groups contained in the fluid to be measured;
a flow-speed distribution measurement processing step for measuring the flow-speed distribution of the fluid to be measured, based upon the flow-speed distribution data of the reflector groups obtained in the reflector-group-speed calculating step;
an optimum-value setting step for calculating the optimum values of the basic frequency f0, the pulse repetition frequency f PRF, and the incident angle .alpha.; and a flow measurement processing step for measuring the flow by further performing computation processing for the flow-speed distribution data of the fluid to be measured, wherein said reflector-group-speed calculating step comprises:
an initial value acquisition step for receiving the initial values of the basic frequency f0, the pulse repetition frequency f PRF, the incident angle .alpha., at the start of measurement; and a reflector-group-speed calculating step for receiving ultrasonic echoes due to ultrasonic pulses cast onto the fluid to be measured, so as to calculate the speed of each of the number of reflectors contained in the fluid to be measured, and wherein said optimum-value setting step includes an emission frequency reset step for resetting the emission frequency to an emission frequency f1 so as to satisfy the following expressions: F0 >= 4V0 sin .alpha.; and f PRF <=
Cw/2Di.
17. An ultrasonic flow measurement method comprising:
a reflector-group-speed calculating step for receiving ultrasonic echoes due to ultrasonic pulses cast onto the fluid to be measured, so as to calculate the speed of each of a number of reflector groups contained in the fluid to be measured;
a flow-speed distribution measurement processing step for measuring the flow-speed distribution of the fluid to be measured, based upon the flow-speed distribution data of the reflector groups obtained in the reflector-group-speed calculating step;
an optimum-value setting step for calculating the optimum values of the basic frequency f0, the pulse repetition frequency f PRF, and the incident angle .alpha.; and a flow measurement processing step for measuring the flow by further performing computation processing for the flow-speed distribution data of the fluid to be measured, wherein said reflector-group-speed calculating step comprises:
an initial value acquisition step for receiving the initial values of the basic frequency f0, the pulse repetition frequency f PRF, the incident angle .alpha., at the start of measurement; and a reflector-group-speed calculating step for receiving ultrasonic echoes due to ultrasonic pulses cast onto the fluid to be measured, so as to calculate the speed of each of the number of reflectors contained in the fluid to be measured, wherein said optimum-value setting step includes an incident angle reset step for resetting the incident angle to .alpha.1 so as to satisfy the following expressions: F0 >= 4V0 sin .alpha.; and f PRF <= Cw/2Di.
a reflector-group-speed calculating step for receiving ultrasonic echoes due to ultrasonic pulses cast onto the fluid to be measured, so as to calculate the speed of each of a number of reflector groups contained in the fluid to be measured;
a flow-speed distribution measurement processing step for measuring the flow-speed distribution of the fluid to be measured, based upon the flow-speed distribution data of the reflector groups obtained in the reflector-group-speed calculating step;
an optimum-value setting step for calculating the optimum values of the basic frequency f0, the pulse repetition frequency f PRF, and the incident angle .alpha.; and a flow measurement processing step for measuring the flow by further performing computation processing for the flow-speed distribution data of the fluid to be measured, wherein said reflector-group-speed calculating step comprises:
an initial value acquisition step for receiving the initial values of the basic frequency f0, the pulse repetition frequency f PRF, the incident angle .alpha., at the start of measurement; and a reflector-group-speed calculating step for receiving ultrasonic echoes due to ultrasonic pulses cast onto the fluid to be measured, so as to calculate the speed of each of the number of reflectors contained in the fluid to be measured, wherein said optimum-value setting step includes an incident angle reset step for resetting the incident angle to .alpha.1 so as to satisfy the following expressions: F0 >= 4V0 sin .alpha.; and f PRF <= Cw/2Di.
18. An ultrasonic flow measurement method comprising:
a reflector-group-speed calculating step for receiving ultrasonic echoes due to ultrasonic pulses cast onto the fluid to be measured, so as to calculate the speed of each of a number of reflector groups contained in the fluid to be measured;
a flow-speed distribution measurement processing step for measuring the flow-speed distribution of the fluid to be measured, based upon the flow-speed distribution data of the reflector groups obtained in the reflector-group-speed calculating step;
a channel distance computing step for computing the minimum channel distance based upon the frequency of the ultrasonic pulses and the speed thereof;
a measurement range display steps for displaying a GUI
which allows the user to determine whether or not the channel distance is set to a value obtained by multiplying the minimum channel distance by an integer, thereby allowing the user to set the measurement region to a value obtained by multiplying the minimum measurement region by an integer;
a channel distance changing step for changing the channel distance to a value obtained by multiplying the minimum channel distance by an integer, according to instructions of the user; and a flow measurement processing step for measuring the flow by further performing computation processing for the flow-speed distribution data of the fluid to be measured.
a reflector-group-speed calculating step for receiving ultrasonic echoes due to ultrasonic pulses cast onto the fluid to be measured, so as to calculate the speed of each of a number of reflector groups contained in the fluid to be measured;
a flow-speed distribution measurement processing step for measuring the flow-speed distribution of the fluid to be measured, based upon the flow-speed distribution data of the reflector groups obtained in the reflector-group-speed calculating step;
a channel distance computing step for computing the minimum channel distance based upon the frequency of the ultrasonic pulses and the speed thereof;
a measurement range display steps for displaying a GUI
which allows the user to determine whether or not the channel distance is set to a value obtained by multiplying the minimum channel distance by an integer, thereby allowing the user to set the measurement region to a value obtained by multiplying the minimum measurement region by an integer;
a channel distance changing step for changing the channel distance to a value obtained by multiplying the minimum channel distance by an integer, according to instructions of the user; and a flow measurement processing step for measuring the flow by further performing computation processing for the flow-speed distribution data of the fluid to be measured.
19. An ultrasonic flow measurement method comprising:
a reflector-group-speed calculating step for receiving ultrasonic echoes due to ultrasonic pulses cast onto the fluid to be measured, so as to calculate the speed of each of a number of reflector groups contained in the fluid to be measured;
a flow-speed distribution measurement processing step for measuring the flow-speed distribution of the fluid to be measured, based upon the flow-speed distribution data of the reflector groups obtained in the reflector-group-speed calculating step;
a channel distance computing step for computing the minimum channel distance based upon the frequency of the ultrasonic pulses and the speed thereof;
a measurement range calculating step for calculating the measurement range based upon the minimum channel distance thus computed;
a channel distance changing step having a function for determining whether or not the channel distance is to be set to a value obtained by multiplying the minimum channel distance by an integer, thereby allowing the system to automatically change the channel distance; and a flow measurement processing step for measuring the flow by further performing computation processing for the flow-speed distribution data of the fluid to be measured.
a reflector-group-speed calculating step for receiving ultrasonic echoes due to ultrasonic pulses cast onto the fluid to be measured, so as to calculate the speed of each of a number of reflector groups contained in the fluid to be measured;
a flow-speed distribution measurement processing step for measuring the flow-speed distribution of the fluid to be measured, based upon the flow-speed distribution data of the reflector groups obtained in the reflector-group-speed calculating step;
a channel distance computing step for computing the minimum channel distance based upon the frequency of the ultrasonic pulses and the speed thereof;
a measurement range calculating step for calculating the measurement range based upon the minimum channel distance thus computed;
a channel distance changing step having a function for determining whether or not the channel distance is to be set to a value obtained by multiplying the minimum channel distance by an integer, thereby allowing the system to automatically change the channel distance; and a flow measurement processing step for measuring the flow by further performing computation processing for the flow-speed distribution data of the fluid to be measured.
20. An ultrasonic flow measurement method comprising:
a reflector-group-speed calculating step for receiving ultrasonic echoes due to ultrasonic pulses cast onto the fluid to be measured, so as to calculate the speed of each of a number of reflector groups contained in the fluid to be measured;
a flow-speed distribution measurement processing step for measuring the flow-speed distribution of the fluid to be measured, based upon the flow-speed distribution data of the reflector groups obtained in the reflector-group-speed calculating step;
a flow-speed distribution output step for outputting the relation between the flow-speed distribution of the fluid to be measured and the distance in the direction of the measurement line ML, in the form of an image on a screen;
a flow-speed zero-line display step for superimposing a fluid-speed zero line on the flow-speed distribution output in the form of an image on a screen in the flow-speed distribution output step;
a flow-speed measurement range switching determination step which allows the user to determine whether or not the flow-speed measurement range is switched;
a flow-speed measurement range switching step for switching the flow-speed measurement range to twice that of the normal measurement range, for measuring the positive flow speed according to the instructions of the user; and a flow measurement processing step for measuring the flow by further performing computation processing for the flow-speed distribution data of the fluid to be measured.
a reflector-group-speed calculating step for receiving ultrasonic echoes due to ultrasonic pulses cast onto the fluid to be measured, so as to calculate the speed of each of a number of reflector groups contained in the fluid to be measured;
a flow-speed distribution measurement processing step for measuring the flow-speed distribution of the fluid to be measured, based upon the flow-speed distribution data of the reflector groups obtained in the reflector-group-speed calculating step;
a flow-speed distribution output step for outputting the relation between the flow-speed distribution of the fluid to be measured and the distance in the direction of the measurement line ML, in the form of an image on a screen;
a flow-speed zero-line display step for superimposing a fluid-speed zero line on the flow-speed distribution output in the form of an image on a screen in the flow-speed distribution output step;
a flow-speed measurement range switching determination step which allows the user to determine whether or not the flow-speed measurement range is switched;
a flow-speed measurement range switching step for switching the flow-speed measurement range to twice that of the normal measurement range, for measuring the positive flow speed according to the instructions of the user; and a flow measurement processing step for measuring the flow by further performing computation processing for the flow-speed distribution data of the fluid to be measured.
21. An ultrasonic flow measurement method comprising:
a reflector-group-speed calculating step for receiving ultrasonic echoes due to ultrasonic pulses cast onto the fluid to be measured, so as to calculate the speed of each of a number of reflector groups contained in the fluid to be measured;
a flow-speed distribution measurement processing step for measuring the flow-speed distribution of the fluid to be measured, based upon the flow-speed distribution data of the reflector groups obtained in the reflector-group-speed calculating step;
a flow-speed range switching determination step which allows the user to determine whether or not the flow-speed measurement range is switched;
a flow-speed distribution output step for outputting the relation between the flow-speed distribution of the fluid to be measured, and the distance in the direction of the measurement line ML, in the form of an image on a screen;
a flow-speed zero-line display step for superimposing a flow-speed zero line on the flow-speed distribution output in the form of an image on a screen in the flow-speed distribution output step;
a flow-speed measurement range switching step for switching the flow-speed measurement range to twice that of the normal measurement mode according to the instructions of the user for measuring the positive flow speed; and a flow measurement processing step for measuring the flow by further performing computation processing for the flow-speed distribution data of the fluid to be measured.
a reflector-group-speed calculating step for receiving ultrasonic echoes due to ultrasonic pulses cast onto the fluid to be measured, so as to calculate the speed of each of a number of reflector groups contained in the fluid to be measured;
a flow-speed distribution measurement processing step for measuring the flow-speed distribution of the fluid to be measured, based upon the flow-speed distribution data of the reflector groups obtained in the reflector-group-speed calculating step;
a flow-speed range switching determination step which allows the user to determine whether or not the flow-speed measurement range is switched;
a flow-speed distribution output step for outputting the relation between the flow-speed distribution of the fluid to be measured, and the distance in the direction of the measurement line ML, in the form of an image on a screen;
a flow-speed zero-line display step for superimposing a flow-speed zero line on the flow-speed distribution output in the form of an image on a screen in the flow-speed distribution output step;
a flow-speed measurement range switching step for switching the flow-speed measurement range to twice that of the normal measurement mode according to the instructions of the user for measuring the positive flow speed; and a flow measurement processing step for measuring the flow by further performing computation processing for the flow-speed distribution data of the fluid to be measured.
22. A program employed for an ultrasonic flowmeter comprising:
a reflector-group-speed calculating step for receiving ultrasonic echoes due to ultrasonic pulses cast onto the fluid to be measured, so as to calculate the speed of each of a number of reflector groups contained in the fluid to be measured;
a flow-speed distribution measurement processing step for measuring the flow-speed distribution of the fluid to be measured, based upon the flow-speed distribution data of the reflector groups obtained in the reflector-group-speed calculating step;
a flow measurement processing step for measuring the flow by further performing computation processing for the flow-speed distribution data of the fluid to be measured, wherein said flow-speed distribution measurement processing step comprises:
a flow-speed distribution calculating step for calculating the flow-speed distribution data of the fluid to be measured, and the center position data of the fluid tube, by performing computation processing for the flow-speed distribution of the reflectors;
a flow-speed distribution data output step for outputting the flow-speed distribution data and center position data thus obtained in the flow-speed distribution calculating step so as to be displayed on display; and an area determination step which allows the user to set a division area where the speed of the reflector groups is calculated in the flow-speed distribution calculating step;
the area of the fluid tube being divided at the center position into two division areas, and said reflector-group-speed calculating step, said flow-speed distribution measurement processing step, and said flow measurement processing step being executed by a computer.
a reflector-group-speed calculating step for receiving ultrasonic echoes due to ultrasonic pulses cast onto the fluid to be measured, so as to calculate the speed of each of a number of reflector groups contained in the fluid to be measured;
a flow-speed distribution measurement processing step for measuring the flow-speed distribution of the fluid to be measured, based upon the flow-speed distribution data of the reflector groups obtained in the reflector-group-speed calculating step;
a flow measurement processing step for measuring the flow by further performing computation processing for the flow-speed distribution data of the fluid to be measured, wherein said flow-speed distribution measurement processing step comprises:
a flow-speed distribution calculating step for calculating the flow-speed distribution data of the fluid to be measured, and the center position data of the fluid tube, by performing computation processing for the flow-speed distribution of the reflectors;
a flow-speed distribution data output step for outputting the flow-speed distribution data and center position data thus obtained in the flow-speed distribution calculating step so as to be displayed on display; and an area determination step which allows the user to set a division area where the speed of the reflector groups is calculated in the flow-speed distribution calculating step;
the area of the fluid tube being divided at the center position into two division areas, and said reflector-group-speed calculating step, said flow-speed distribution measurement processing step, and said flow measurement processing step being executed by a computer.
23. A program employed for an ultrasonic flowmeter comprising:
a reflector-group-speed calculating step for receiving ultrasonic echoes due to ultrasonic pulses cast onto the fluid to be measured, so as to calculate the speed of each of a number of reflector groups contained in the fluid to be measured;
a flow-speed distribution measurement processing step for measuring the flow-speed distribution of the fluid to be measured, based upon the flow-speed distribution data of the reflector groups obtained in the reflector-group-speed calculating step; and a flow measurement processing step for measuring the flow by further performing computation processing for the flow-speed distribution data of the fluid to be measured, wherein said flow-speed distribution measurement processing step comprises:
a flow-speed distribution calculating step for calculating the flow-speed distribution data of the fluid to be measured, and the center position data of the fluid tube, by performing computation processing for the flow-speed distribution of the reflectors;
an automatic area selecting step for automatically selecting a division area where the flow-speed distribution is calculated using the reflector groups; the area of the fluid tube being divided at the center position into two division areas; and a flow-speed distribution data output step for outputting the flow-speed distribution data and the center position data obtained in the flow-speed distribution calculating step and the automatic area selecting step, so as to be displayed on display, and said reflector-group-speed calculating step, said flow-speed distribution measurement processing step, and said flow measurement processing step being executed by a computer.
a reflector-group-speed calculating step for receiving ultrasonic echoes due to ultrasonic pulses cast onto the fluid to be measured, so as to calculate the speed of each of a number of reflector groups contained in the fluid to be measured;
a flow-speed distribution measurement processing step for measuring the flow-speed distribution of the fluid to be measured, based upon the flow-speed distribution data of the reflector groups obtained in the reflector-group-speed calculating step; and a flow measurement processing step for measuring the flow by further performing computation processing for the flow-speed distribution data of the fluid to be measured, wherein said flow-speed distribution measurement processing step comprises:
a flow-speed distribution calculating step for calculating the flow-speed distribution data of the fluid to be measured, and the center position data of the fluid tube, by performing computation processing for the flow-speed distribution of the reflectors;
an automatic area selecting step for automatically selecting a division area where the flow-speed distribution is calculated using the reflector groups; the area of the fluid tube being divided at the center position into two division areas; and a flow-speed distribution data output step for outputting the flow-speed distribution data and the center position data obtained in the flow-speed distribution calculating step and the automatic area selecting step, so as to be displayed on display, and said reflector-group-speed calculating step, said flow-speed distribution measurement processing step, and said flow measurement processing step being executed by a computer.
24. A program employed for an ultrasonic flowmeter comprising:
a reflector-group-speed calculating step for receiving ultrasonic echoes due to ultrasonic pulses cast onto the fluid to be measured, so as to calculate the speed of each of a number of reflector groups contained in the fluid to be measured;
a flow-speed distribution measurement processing step for measuring the flow-speed distribution of the fluid to be measured, based upon the flow-speed distribution data of the reflector groups obtained in the reflector-group-speed calculating step;
an optimum-value setting step for calculating the optimum values of the basic frequency f0, the pulse repetition frequency f PRF, and the incident angle .alpha.; and a flow measurement processing step for measuring the flow by further performing computation processing for the flow-speed distribution data of the fluid to be measured, wherein said reflector-group-speed calculating step comprises:
an initial value acquisition step for receiving the initial values of the basic frequency f0, the pulse repetition frequency f PRF, the incident angle .alpha., at the start of measurement; and a reflector-group-speed calculating step for receiving ultrasonic echoes due to ultrasonic pulses cast onto the fluid to be measured, so as to calculate the speed of each of the number of reflectors contained in the fluid to be measured, and wherein said optimum-value setting step includes an emission frequency reset step for resetting the emission frequency to an emission frequency f1 so as to satisfy the following expressions: F0 >= 4V0 .cndot. sin .alpha.; and f PRF <=
Cw/2Di, and said reflector-group-speed calculating step, said flow-speed distribution measurement processing step, said optimum-value setting step, and said flow measurement processing step being executed by a computer.
a reflector-group-speed calculating step for receiving ultrasonic echoes due to ultrasonic pulses cast onto the fluid to be measured, so as to calculate the speed of each of a number of reflector groups contained in the fluid to be measured;
a flow-speed distribution measurement processing step for measuring the flow-speed distribution of the fluid to be measured, based upon the flow-speed distribution data of the reflector groups obtained in the reflector-group-speed calculating step;
an optimum-value setting step for calculating the optimum values of the basic frequency f0, the pulse repetition frequency f PRF, and the incident angle .alpha.; and a flow measurement processing step for measuring the flow by further performing computation processing for the flow-speed distribution data of the fluid to be measured, wherein said reflector-group-speed calculating step comprises:
an initial value acquisition step for receiving the initial values of the basic frequency f0, the pulse repetition frequency f PRF, the incident angle .alpha., at the start of measurement; and a reflector-group-speed calculating step for receiving ultrasonic echoes due to ultrasonic pulses cast onto the fluid to be measured, so as to calculate the speed of each of the number of reflectors contained in the fluid to be measured, and wherein said optimum-value setting step includes an emission frequency reset step for resetting the emission frequency to an emission frequency f1 so as to satisfy the following expressions: F0 >= 4V0 .cndot. sin .alpha.; and f PRF <=
Cw/2Di, and said reflector-group-speed calculating step, said flow-speed distribution measurement processing step, said optimum-value setting step, and said flow measurement processing step being executed by a computer.
25. A program employed for an ultrasonic flowmeter comprising:
a reflector-group-speed calculating step for receiving ultrasonic echoes due to ultrasonic pulses cast onto the fluid to be measured, so as to calculate the speed of each of a number of reflector groups contained in the fluid to be measured;
a flow-speed distribution measurement processing step for measuring the flow-speed distribution of the fluid to be measured, based upon the flow-speed distribution data of the reflector groups obtained in the reflector-group-speed calculating step;
an optimum-value setting step for calculating the optimum values of the basic frequency f0, the pulse repetition frequency f PRF, and the incident angle .alpha.; and a flow measurement processing step for measuring the flow by further performing computation processing for the flow-speed distribution data of the fluid to be measured, wherein said reflector-group-speed calculating step comprises:
an initial value acquisition step for receiving the initial values of the basic frequency f0, the pulse repetition frequency f PRF, the incident angle .alpha., at the start of measurement; and a reflector-group-speed calculating step for receiving ultrasonic echoes due to ultrasonic pulses cast onto the fluid to be measured, so as to calculate the speed of each of the number of reflectors contained in the fluid to be measured, and wherein said optimum-value setting step includes an incident angle reset step for resetting the incident angle to al so as to satisfy the following expressions: Fo >= 4V0 .cndot.
sin .alpha.; and f PRF <= Cw/2Di, and said reflector-group-speed calculating step, said flow-speed distribution measurement processing step, said optimum-value setting step, and said flow measurement processing step being executed by a computer.
a reflector-group-speed calculating step for receiving ultrasonic echoes due to ultrasonic pulses cast onto the fluid to be measured, so as to calculate the speed of each of a number of reflector groups contained in the fluid to be measured;
a flow-speed distribution measurement processing step for measuring the flow-speed distribution of the fluid to be measured, based upon the flow-speed distribution data of the reflector groups obtained in the reflector-group-speed calculating step;
an optimum-value setting step for calculating the optimum values of the basic frequency f0, the pulse repetition frequency f PRF, and the incident angle .alpha.; and a flow measurement processing step for measuring the flow by further performing computation processing for the flow-speed distribution data of the fluid to be measured, wherein said reflector-group-speed calculating step comprises:
an initial value acquisition step for receiving the initial values of the basic frequency f0, the pulse repetition frequency f PRF, the incident angle .alpha., at the start of measurement; and a reflector-group-speed calculating step for receiving ultrasonic echoes due to ultrasonic pulses cast onto the fluid to be measured, so as to calculate the speed of each of the number of reflectors contained in the fluid to be measured, and wherein said optimum-value setting step includes an incident angle reset step for resetting the incident angle to al so as to satisfy the following expressions: Fo >= 4V0 .cndot.
sin .alpha.; and f PRF <= Cw/2Di, and said reflector-group-speed calculating step, said flow-speed distribution measurement processing step, said optimum-value setting step, and said flow measurement processing step being executed by a computer.
26. A program employed for an ultrasonic flowmeter comprising:
a reflector-group-speed calculating step for receiving ultrasonic echoes due to ultrasonic pulses cast onto the fluid to be measured, so as to calculate the speed of each of a number of reflector groups contained in the fluid to be measured;
a flow-speed distribution measurement processing step for measuring the flow-speed distribution of the fluid to be measured, based upon the flow-speed distribution data of the reflector groups obtained in the reflector-group-speed calculating step;
a channel distance computing step for computing the minimum channel distance based upon the frequency of the ultrasonic pulses and the speed thereof;
a measurement range display step for displaying a GUI
which allows the user to determine whether or not the channel distance is set to a value obtained by multiplying the minimum channel distance by an integer, thereby allowing the user to set the measurement region to a value obtained by multiplying the minimum measurement region by an integer;
a channel distance changing step for changing the channel distance to a value obtained by multiplying the minimum channel distance by an integer, according to instructions of the user; and a flow measurement processing step for measuring the flow by further performing computation processing for the flow-speed distribution data of the fluid to be measured, said respective steps being executed by a computer.
a reflector-group-speed calculating step for receiving ultrasonic echoes due to ultrasonic pulses cast onto the fluid to be measured, so as to calculate the speed of each of a number of reflector groups contained in the fluid to be measured;
a flow-speed distribution measurement processing step for measuring the flow-speed distribution of the fluid to be measured, based upon the flow-speed distribution data of the reflector groups obtained in the reflector-group-speed calculating step;
a channel distance computing step for computing the minimum channel distance based upon the frequency of the ultrasonic pulses and the speed thereof;
a measurement range display step for displaying a GUI
which allows the user to determine whether or not the channel distance is set to a value obtained by multiplying the minimum channel distance by an integer, thereby allowing the user to set the measurement region to a value obtained by multiplying the minimum measurement region by an integer;
a channel distance changing step for changing the channel distance to a value obtained by multiplying the minimum channel distance by an integer, according to instructions of the user; and a flow measurement processing step for measuring the flow by further performing computation processing for the flow-speed distribution data of the fluid to be measured, said respective steps being executed by a computer.
27. A program employed for an ultrasonic flowmeter comprising:
a reflector-group-speed calculating step for receiving ultrasonic echoes due to ultrasonic pulses cast onto the fluid to be measured, so as to calculate the speed of each of a number of reflector groups contained in the fluid to be measured;
a flow-speed distribution measurement processing step for measuring the flow-speed distribution of the fluid to be measured, based upon the flow-speed distribution data of the reflector groups obtained in the reflector-group-speed calculating step;
a channel distance computing step for computing the minimum channel distance based upon the frequency of the ultrasonic pulses and the speed thereof;
a measurement range calculating step for calculating the measurement range based upon the minimum channel distance thus computed;
a channel distance changing step having a function for determining whether or not the channel distance is to be set to a value obtained by multiplying the minimum channel distance by an integer, thereby allowing the system to automatically change the channel distance; and a flow measurement processing step for measuring the flow by further performing computation processing for the flow-speed distribution data of the fluid to be measured, said respective steps being executed by a computer.
a reflector-group-speed calculating step for receiving ultrasonic echoes due to ultrasonic pulses cast onto the fluid to be measured, so as to calculate the speed of each of a number of reflector groups contained in the fluid to be measured;
a flow-speed distribution measurement processing step for measuring the flow-speed distribution of the fluid to be measured, based upon the flow-speed distribution data of the reflector groups obtained in the reflector-group-speed calculating step;
a channel distance computing step for computing the minimum channel distance based upon the frequency of the ultrasonic pulses and the speed thereof;
a measurement range calculating step for calculating the measurement range based upon the minimum channel distance thus computed;
a channel distance changing step having a function for determining whether or not the channel distance is to be set to a value obtained by multiplying the minimum channel distance by an integer, thereby allowing the system to automatically change the channel distance; and a flow measurement processing step for measuring the flow by further performing computation processing for the flow-speed distribution data of the fluid to be measured, said respective steps being executed by a computer.
28. A program employed for an ultrasonic flowmeter comprising:
a reflector-group-speed calculating step for receiving ultrasonic echoes due to ultrasonic pulses cast onto the fluid to be measured, so as to calculate the speed of each of a number of reflector groups contained in the fluid to be measured;
a flow-speed distribution measurement processing step for measuring the flow-speed distribution of the fluid to be measured, based upon the flow-speed distribution data of the reflector groups obtained in the reflector-group-speed calculating step;
a flow-speed distribution output step for outputting the relation between the flow-speed distribution of the fluid to be measured and the distance in the direction of the measurement line ML, in the form of an image on a screen;
a flow-speed zero-line display step for superimposing a fluid-speed zero line on the flow-speed distribution output in the form of an image on a screen in the flow-speed distribution output step;
a flow-speed measurement range switching determination step which allows the user to determine whether or not the flow-speed measurement range is switched;
a flow-speed measurement range switching step for switching the flow-speed measurement range to twice that of the normal measurement range, for measuring the positive flow speed according to the instructions of the user; and a flow measurement processing step for measuring the flow by further performing computation processing for the flow-speed distribution data of the fluid to be measured, said respective steps being executed by a computer.
a reflector-group-speed calculating step for receiving ultrasonic echoes due to ultrasonic pulses cast onto the fluid to be measured, so as to calculate the speed of each of a number of reflector groups contained in the fluid to be measured;
a flow-speed distribution measurement processing step for measuring the flow-speed distribution of the fluid to be measured, based upon the flow-speed distribution data of the reflector groups obtained in the reflector-group-speed calculating step;
a flow-speed distribution output step for outputting the relation between the flow-speed distribution of the fluid to be measured and the distance in the direction of the measurement line ML, in the form of an image on a screen;
a flow-speed zero-line display step for superimposing a fluid-speed zero line on the flow-speed distribution output in the form of an image on a screen in the flow-speed distribution output step;
a flow-speed measurement range switching determination step which allows the user to determine whether or not the flow-speed measurement range is switched;
a flow-speed measurement range switching step for switching the flow-speed measurement range to twice that of the normal measurement range, for measuring the positive flow speed according to the instructions of the user; and a flow measurement processing step for measuring the flow by further performing computation processing for the flow-speed distribution data of the fluid to be measured, said respective steps being executed by a computer.
29. A program employed for an ultrasonic flowmeter comprising:
a reflector-group-speed calculating step for receiving ultrasonic echoes due to ultrasonic pulses cast onto the fluid to be measured, so as to calculate the speed of each of a number of reflector groups contained in the fluid to be measured;
a flow-speed distribution measurement processing step for measuring the flow-speed distribution of the fluid to be measured, based upon the flow-speed distribution data of the reflector groups obtained in the reflector-group-speed calculating step;
a flow-speed range switching determination step which allows the user to determine whether or not the flow-speed measurement range is switched;
a flow-speed distribution output step for outputting the relation between the flow-speed distribution of the fluid to be measured, and the distance in the direction of the measurement line ML, in the form of an image on a screen;
a flow-speed zero-line display step for superimposing a flow-speed zero line on the flow-speed distribution output in the form of an image on a screen in the flow-speed distribution output step;
a flow-speed measurement range switching step for switching the flow-speed measurement range to twice that of the normal measurement mode according to the instructions of the user for measuring the positive flow speed; and a flow measurement processing step for measuring the flow by further performing computation processing for the flow-speed distribution data of the fluid to be measured, said respective steps being executed by a computer.
a reflector-group-speed calculating step for receiving ultrasonic echoes due to ultrasonic pulses cast onto the fluid to be measured, so as to calculate the speed of each of a number of reflector groups contained in the fluid to be measured;
a flow-speed distribution measurement processing step for measuring the flow-speed distribution of the fluid to be measured, based upon the flow-speed distribution data of the reflector groups obtained in the reflector-group-speed calculating step;
a flow-speed range switching determination step which allows the user to determine whether or not the flow-speed measurement range is switched;
a flow-speed distribution output step for outputting the relation between the flow-speed distribution of the fluid to be measured, and the distance in the direction of the measurement line ML, in the form of an image on a screen;
a flow-speed zero-line display step for superimposing a flow-speed zero line on the flow-speed distribution output in the form of an image on a screen in the flow-speed distribution output step;
a flow-speed measurement range switching step for switching the flow-speed measurement range to twice that of the normal measurement mode according to the instructions of the user for measuring the positive flow speed; and a flow measurement processing step for measuring the flow by further performing computation processing for the flow-speed distribution data of the fluid to be measured, said respective steps being executed by a computer.
Applications Claiming Priority (9)
| Application Number | Priority Date | Filing Date | Title |
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| JP2002-163648 | 2002-06-04 | ||
| JP2002-163651 | 2002-06-04 | ||
| JP2002163651A JP3648216B2 (en) | 2002-06-04 | 2002-06-04 | Doppler type ultrasonic flowmeter, flow measurement method using Doppler type ultrasonic flowmeter, and program for flow measurement |
| JP2002163648A JP3602112B2 (en) | 2002-06-04 | 2002-06-04 | Doppler ultrasonic flowmeter, flow measurement method using Doppler ultrasonic flowmeter, and flow measurement program |
| JP2002-164860 | 2002-06-05 | ||
| JP2002164860A JP3602114B2 (en) | 2002-06-04 | 2002-06-05 | Doppler ultrasonic flowmeter, flow measurement method using Doppler ultrasonic flowmeter, and flow measurement program |
| JP2002164859A JP3602113B2 (en) | 2002-06-04 | 2002-06-05 | Doppler ultrasonic flowmeter, flow measurement method using Doppler ultrasonic flowmeter, and flow measurement program |
| JP2002-164859 | 2002-06-05 | ||
| PCT/JP2003/007030 WO2003102513A1 (en) | 2002-06-04 | 2003-06-03 | Doppler type ultrasonic flowmeter, flow rate measuring method using doppler type ultrasonic flowmeter and flow rate measuring program used in this doppler type ultrasonic flowmeter |
Publications (2)
| Publication Number | Publication Date |
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| CA2488036A1 true CA2488036A1 (en) | 2003-12-11 |
| CA2488036C CA2488036C (en) | 2011-08-09 |
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| CA2488036A Expired - Fee Related CA2488036C (en) | 2002-06-04 | 2003-06-03 | Doppler type ultrasonic flowmeter, method of operation and flow rate measuring method |
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| EP (4) | EP1808674B1 (en) |
| KR (1) | KR100664366B1 (en) |
| CN (1) | CN100370231C (en) |
| AU (1) | AU2003241982A1 (en) |
| CA (1) | CA2488036C (en) |
| TW (1) | TWI223055B (en) |
| WO (1) | WO2003102513A1 (en) |
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| KR101158792B1 (en) * | 2010-12-02 | 2012-06-22 | 아이에스테크놀로지 주식회사 | Coherent doppler velocity measuring method using signal mixing technique and device therefor |
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2003
- 2003-06-03 CN CNB038178702A patent/CN100370231C/en not_active Expired - Fee Related
- 2003-06-03 WO PCT/JP2003/007030 patent/WO2003102513A1/en active Application Filing
- 2003-06-03 EP EP07008310A patent/EP1808674B1/en not_active Expired - Lifetime
- 2003-06-03 EP EP07008326A patent/EP1808676B1/en not_active Expired - Lifetime
- 2003-06-03 EP EP03733278A patent/EP1510794A4/en not_active Withdrawn
- 2003-06-03 AU AU2003241982A patent/AU2003241982A1/en not_active Abandoned
- 2003-06-03 US US10/514,566 patent/US7712382B2/en not_active Expired - Fee Related
- 2003-06-03 CA CA2488036A patent/CA2488036C/en not_active Expired - Fee Related
- 2003-06-03 TW TW092115066A patent/TWI223055B/en not_active IP Right Cessation
- 2003-06-03 EP EP07008311A patent/EP1808675B1/en not_active Expired - Lifetime
- 2003-06-03 KR KR1020047019726A patent/KR100664366B1/en not_active IP Right Cessation
Also Published As
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| CA2488036C (en) | 2011-08-09 |
| TW200407531A (en) | 2004-05-16 |
| CN100370231C (en) | 2008-02-20 |
| EP1808674A2 (en) | 2007-07-18 |
| EP1510794A4 (en) | 2006-04-12 |
| EP1808676A3 (en) | 2009-07-29 |
| EP1808674A3 (en) | 2009-07-29 |
| US7712382B2 (en) | 2010-05-11 |
| EP1808676B1 (en) | 2012-05-30 |
| EP1808675B1 (en) | 2012-05-23 |
| EP1808675A2 (en) | 2007-07-18 |
| CN1672015A (en) | 2005-09-21 |
| TWI223055B (en) | 2004-11-01 |
| KR100664366B1 (en) | 2007-01-02 |
| EP1808676A2 (en) | 2007-07-18 |
| EP1808674B1 (en) | 2012-05-23 |
| EP1510794A1 (en) | 2005-03-02 |
| WO2003102513A1 (en) | 2003-12-11 |
| AU2003241982A1 (en) | 2003-12-19 |
| KR20050005533A (en) | 2005-01-13 |
| US20050245827A1 (en) | 2005-11-03 |
| EP1808675A3 (en) | 2009-07-29 |
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